import assert from 'node:assert/strict'
import test from 'node:test'

import { fetchDownloadInfo } from '../src/DownloadMetadata'

test('download metadata uses the common RFC filename parser', async () => {
  const originalFetch = globalThis.fetch
  globalThis.fetch = async () =>
    new Response(null, {
      headers: {
        'content-disposition': "attachment; filename*=UTF-8''%E6%8A%A5%E5%91%8A.pdf",
        'content-length': '1024',
        'content-type': 'application/pdf; charset=utf-8',
      },
      status: 200,
    })

  try {
    assert.deepEqual(await fetchDownloadInfo('https://example.test/download'), {
      url: 'https://example.test/download',
      suggestedFilename: '报告.pdf',
      mimeType: 'application/pdf',
      fileSize: 1024,
    })
  } finally {
    globalThis.fetch = originalFetch
  }
})

test('download metadata falls back to a sanitized URL filename', async () => {
  const originalFetch = globalThis.fetch
  globalThis.fetch = async () => {
    throw new Error('offline')
  }

  try {
    assert.deepEqual(await fetchDownloadInfo('https://example.test/a%20b.txt?token=1'), {
      url: 'https://example.test/a%20b.txt?token=1',
      suggestedFilename: 'a b.txt',
    })
  } finally {
    globalThis.fetch = originalFetch
  }
})